Metal-bending machine.



\NO. 734,316. PATBNT'ED JULY 21, 1903.

H. GEISENHONER.

METAL BENDING MACHINE.

APPLIUATION FILED SEPT. 29, 1900.

N0 MODEL.

I l I O i I: I k In. E Hlni {\B G m H W C F- (2/, H12; \H Y W is D Hem eeisenhner UNITED STATES Patented July 21, 1903.

PATENT OFFICE. I

HENRY GEISENH'ONERLOF IsOHENEOTADY, NEW YORK, ASSIGNOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

xM ETAL -BE N'DIjNG MACHINE.

SPECIFICATION forming part of Letters Patent'No. 734,316, dated July 21 1903.

Application filed September 29, 1900. Serial No. 31,475. (No model.)

To all whom it-moty concern.-

Be it known that I, HENRY GEISENHONER, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvementsin Metal-Bending Machines, of which the following is a specification.

This invention relates to a machine for bending metal bars or strips which is specially adapted for the production of arm-ature-bars for electrical machines. Such bars are adapted for use as end connections or as coils for such machines and consist before they are formed intothe final desired shape of two parallel strips of metal in the same plane and joined at one end, the strips being afterward bent in opposite directions for use as end connections and then further shaped if it is desired to use them' as coils. Hitherto these bars have been made by sawing out a kerf longitudinally through the center of the strip nearly to one end, so that the result was two narrower strips connected at that end. The article itself, as well as the process of making it, was very crude and unperfected,

as it was practically impossible to make the kerf uniformly central throughout the length of the strip. Hence 'when the strips were wound in the slots of the machine theseslots being of definite depth the strips would not be evenly distributed in the slots, and, fur

' thermore, the operation of sawing was'very expensive and at best left a bur which .re-

quired to be removed by filing before the strip could be used.

The article produced by a machine constrncted in accordance with this'invention is made from a strip of copper having its edges already slightl-y rounded which'is bented'ge wise upon itself, so that two resultant parallel strips in the same plane and of equal width are formed from the same strip, and,

as no cutting or sawing has been done the edges are perfectly smooth and require no filing or other finishing. This apparatus, while accomplishing such a remarkable object as bonding a metallic strip of one-eighth inch thickness or more edgewise upon itself, is comparatively simple, is manually operated, requiring an application orvery little I energy, and can be easily attached to a suitable bench or table.

, Of the drawings, Figure l is a side elevation of the apparatus,'showing-it securedto a bench X. Fig. 2 is a plan showing the primary Operating-lever L, carried through its preliminary traverse to a position from which both thelever L itself and the secondaryopcrating-lever V are about to be simultaneously moved. Fig. 3 is a vertical section along the line 3 3 of Fig. 2, the secondary operating-lever V being assumed to have been moved to the position Occupied by lever L in Fig. 2. Fig. 4 is a view of the antibuckling-plates, between which themetallic strip which is to be bent is held; and Fig. 5

is the tool which'operates at the portion of the edge of the strip which is being bent.

-In Fig. 1, F indicates the main support, which is secured by suitable'bolts (shown at the left) andwhich has a rounded projection at the right, which, with the cover or block G suitably secured on topof the support, forms 'a slotY for the passage of the metallic strip A, which is to be bent. This slot Y broadens out in the central front portion of Fig.v 1 into a tapered opening, which is more clearly shown in Fig. 3, and in thisopening are secured the antibuckling-plates D D of Fig. 4. These plates are tapered to corre- 8o spond with the tapered opening Y and are provided with slots 0, in which fits a tongue or standard B, which extends entirely through the-plate D and is also tapered longitudinally to correspond with the tapered walls of D a sufiicient distancefapartj t'o' permit .the reception of the metallic strip A, the lug Z assisting the tongue-B in thisoffice. (lorre- 5 sponding shoulders Zare formed on thepla'tes and are adapted to be engaged by an attach- I ing device to be described hereinafter. The nOn-opposingsurfaces of theplates are formed with recesses E E, which are adapted to re- :00

ceive a locking-bolt, as described hereinafter. After the metallic strip has been inserted on one side of the tongue, between the latter and the lug Z, the plates are broughttogether, the tongue B entering into the slot 0 in the plate D. Thereupon the left-hand ends of the plates, which have the same rounded shape which the strip is to have after it has been bent, are inserted in the opening Y, as shown in Figs. 3 and 4, the central part of Fig. 1 showing the rounded ends of the plates D and D and the tongue 13 and a section of the metallic strip A.

As shown at the bottom of Fig. 2, as the plates D D are inserted in the opening Y their shoulders Z engage a pivoted lever Q. After the plates have been inserted the long lever K at the left is moved downward, so that the lever T will force the bolt 0, which is forked at I, to the right to engage the recesses E and E and lock the plates within the apparatus.

As shown in Fig. 3, the main support F is provided with a lower projection M, and the cover G is provided with a corresponding upper projection N.

As shown in Fig. 2, the support F and the cover G are formed with registering annular passages, and through the passage J thus formed moves the bending-tool H, as shown in Fig. 3, wherein it may be also seen thatthe left-hand wall of the annular passage J is formed by the righthand vertical surfaces of the support F and cover G and their respective projections M and N. Mounted on the projection N as a pivot is the primary bending-lever L, shown in Figs. 1 and 2 as provided with a pin P, which engages the free end of the metallic strip A, which is to be bent. Also mounted on the projection N as a pivot is a secondary actuating-lever V, which holds the lever L in position and is itself secured to the projection N by the same bolt which. holds the lever L in place. It is clear from Fig. 5 that the tool H is provided with a lateral projection H, and on reference to the dotted lines of Fig. 1 it will be seen that this lateral projection extends up into the lever V, which is formed with a recess which fits it exactly, so that the turning of the leverVwill move the tool H in the slot J.

As shown in Figs. 2 and 3, the tool II also of course extends through the leverL, which has a perforation which allows it a limited relative movement with respect to the tool. This perforation may be seen in Fig. 2 as the space bounded by the walls of the slot J between the center of the tool H and the point L. Mounted on the lower projection M of the support F is a washer W, corresponding in shape to the head of the lever V, and also provided, as shown by the dotted lines at the lower portion of Fig. l, with a recess for the reception of the tool H and its lateral projection II. This washer is rotatably held to the projection by a suitable bolt, as is the lever V. In their initial positions the levers L and V of Fig. 2 are in the extreme lefthand portion of the slot J. As in the operation of bending the angle of the strip being bent is constantly changing, it is impracticable to use the single bending-tool. It has therefore been found advisable, in order to prevent buckling, to operate upon the metallic strip at two difierent points. When the strip and the parts of the machines are in the position just described, the handle of the lever L is moved clockwise, forcing the pin P against the free end of the strip A, so that the strip is bent around one end of the tongue or standard B. A limited independent movement of the lever Lis permitted, owing to the shape of the perforation in said lever through which the tool H passes. When the lefthand end of this perforation engages the tool H, the leverL is checked, and if buckling is to be avoided both the pin P and tool H must be moved clockwisesimultaneously, the pin P forcing the free end of the strip downward and the tool H bearing against the outer edge of the strip at the point where the bending is taking place.

As shown in Fig. 2, the outer curved portion of the lateral projection H bears against the wall of the annular passage J. The tongue or standard 13, which has considerable cross-section andv is firmly anchored in the plates D and D, will not yield to the enormous strain put upon it by the operation of bending the strip about its upper end.

As shown in Fig. 5, a strip U is'removably attached to the operating side of the tool, thus adapting it for acting upon a strip of certain width. The operation of bending is continued until the lever L reaches the righthand end of the annular passage J, carrying the free end of the strip A around through the slot Y until it lies in a position along the opposite side of the standard B and parallel to its fixed portion. Thereupon the lefthand lever K is moved upward, withdrawing the bolt 0 from the recesses E E and cansing the projection S to force the bar R down against the pivoted lever Q, which is forced thereby against the shoulder Z of the plates, which are thus removed from the opening Y.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. An apparatus for bending bars or strips, which comprises a standard, separate means acting at diiferent parts of the-bar for bending one end thereof around the standard, and means for preventing the bar from buckling and moving laterally.

2. An apparatus for bending a metallic strip, which comprises two antibucklingplates, a standard held in said plates, separate means acting at difierent parts of the bar for bending it around the standard, and a lug on one of the plates which with the standard forms a groove for the reception of the metallic strip.

3. An apparatus for bending metallic strips provided withaholding member for the strip,

a lever, a member operated thereby for engaging the free end of the strip, and a second member also operated by said lever for engaging the strip at the bending-point.

4. An apparatus for bending metallic strips, which comprises tapered antibucklingplates adapted to form between them a groove for the strip, a tapered die for the reception of the plates, and means for locking the plates therein.

5. An apparatus for bending metallic strips, which comprises two antibucklingplates having slots, a tongue or standard held in the slots, and a lug or shoulder which cooperates with the tongue to separate the plates, and which with the tongue holds both edges of the strip.

6. An apparatus for bending metallic strips, which comprises two antibucklingplates which are provided on their non-op posing surfaces with recesses tion of locking-plates.

7. An apparatus for bending metallic strips, which comprises a standard, means for holding one portion of the strip against the standard, means acting on the free end of the strip to bend it about the standard, and a cooperating tool which acts on the edge of the strip at the bending-point.

8. An apparatus for bending metallic strips, which comprises means for holding a strip, a standard, means acting upon the free end of the strip to bend it about the stand ard, and a cooperating tool which is moved for the recepconcentric with the bending center and acts ratus, a tool cooperating in the passage with metallic.

on the edge of the strip.

9. An apparatus for bending strips, which comprises means for holding the strip, a standard, a lever carrying a pin which acts upon the free end of the strip to bend it about the standard, a second cooperating lever concentric with the bending center, and a cooperating finishing-tool moved'bythe said lever to act on the edge of the strip at the point where the bending is being simultaneously accomplished by the first lever andits pin.

. 10. An apparatus for bending metallic strips, which comprises two antibucklingplates having one set of ends formed in circular arcs, a standard extending between the plates, means for holding the plates and having an annular passage therein encircling said ends of the plates, a lever pivoted concentric with said circular ends and said passage, and a tool carried by said lever through the passage to operate on the edge of the strip to bend it about the standard.

11. An apparatus for bending flat metallic strips or ribbons, which comprises two plates for tightly holding the strip to prevent broadside buckling, an annular passage in one plate, a lever pivoted concentric with the passage, and a bending-tool carried by the lever through the passage.

12. An apparatus for bending metallic strips, which comprises means for holding the strip, an annular passage therein, a lever, a washergand a tool in the passage having a lateral projection which is held at its ends in recesses in the lever and washer. I

13. An apparatus for bending metallic strips, which comprises means for holding the strip, an annular passage therein, a tool located in the passage, and a pivotedlever having a recess for the tool of greater size than the latter, whereby the lever has a limited preliminary traverse.

14. An apparatus for bending metallic strips, which comprises a main support and a cover thereon, which are adapted to. hold'the strip and are formed with an annular passage extending through them, a bending-tool having a lateral projection and operating in the passage, a lever pivoted to the coverand having a recess for the reception of the tool and its lateral projection, and a washer on the lower part of the main support having a recess for the reception of the tool and its lateral projection.

15. An apparatus for bending metallic strips, which comprises a main support and a cover thereon, which together form a tapered lateral opening and have an annularpassage extending vertically through them, antibuckling-plates which are held in said lateral opening for the reception of the strip, which strip extends through both sides of the apparatus,a lever carrying a pin outside the apparatus which engages with the free end of the strip to bend the same, said lever having a recess which opens inside the appas'aid lever and pin, and extending into the recess in said lever, whereby the latter has tool and mounted and held on the end of the projection of the cover as a center, and holding the first lever in position, and a Washer similar to said second lever and mounted on the projection of the main support as a pivot.

17. An apparatus for bending metallic strips, which comprises two antibuckling- ICO plates, a main support and a cover which togetl er provide a lateral opening from one side to another, a portion of said opening being enlarged to receive said plates, and the other being smaller to permit the passage of the strip.

18. An apparatus for bending metallic strips, which comprises a main portion having an opening, antibuckling-plates adapted to be inserted in the opening, and provided with recesses, a bolt which engages said recesses, and an actuating-lever therefor,which is pivoted to said main portion.

19. An apparatus for bending metallic strips, which comprises a main portion, antibuckling-plates adapted to be held therein and provided with shoulders, a lever pivoted to the main portion and adapted to be engaged by the shoulders of the plates, a bar which abuts against the lever to force the plates away from the main portion, and a lever pivoted to the main portion and adapted to actuate the bar.

20. An apparatus for bending metallic strips, which comprises a main portion, antibuckling-plates adapted to be held therein and provided with corresponding shoulders, and with recesses on the non-opposing faces, a lever pivoted to the main portion, a forked bolt actuated by the lever to enter the recesses and lock the lever in position and to be withdrawn from the recesses, and a bar extending between the ties of the forked bolt, and adapted to be actuated simultaneously with the withdrawal of the bolt to force the plates from their position in the main portion.

In witness whereof I have hereunto set my hand this 27th day of September, 1200.

HENRY GEISENHONER. WVitnesses:

BENJAMIN B. HULL, CAROLYN L. HAYNES. 

